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Cleveland C86219 cobalt spiral point tap 3/8-24 UNF black oxide finish three flutes

Cleveland

Cleveland C86219 Spiral Point Tap 3/8-24 UNF Cobalt 3 Flutes

SKU CH-TY0Z-GC26P

Spiral point tap cuts 3/8-24 UNF threads in 15/16 in depth with three cobalt flutes

  • Cuts clean threads in hard metals with cobalt construction
  • Reduces chip buildup using spiral-point 3-flute design
  • Matches precise 3/8-24 UNF specifications for accurate fit
  • Drills 8.50 mm pilot holes for 75% thread engagement
  • Delivers 2B class fit with right-hand thread orientation

Cleveland C86219 Spiral Point Tap for UNF Threading

The Cleveland C86219 is a spiral point tap designed to cut 3/8-24 UNF threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread production in steel or alloy workpieces. The cobalt construction with black oxide finish provides wear resistance during repetitive tapping operations. This tool is not for buyers who require a bottoming tap for blind holes.

Installation uses standard tap wrenches

The plug chamfer starts threads easily in pre-drilled holes matching the 8.50 mm drill size for 75 percent thread engagement. Cobalt material demands cutting fluid and proper alignment to prevent chipping the flutes. Common issues include oversized threads from excessive feed pressure or tap breakage in hardened materials without adequate lubrication. The three-flute design aids chip evacuation forward through the hole.

3/8-24 UNF thread size with 2B class of fit

This single specification determines whether the tap matches the required fastener specification for the assembly. The 2B class of fit governs the tolerance zone for standard unified fine threads in general applications. Thread length measures 1 47/64 inches within an overall length of 3 15/16 inches. Verify the thread size and fit class against the engineering drawing before ordering.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

How can I verify the Cleveland C86219 spiral point tap is cutting correctly after setup?

The tap should produce clean, continuous chips that curl forward through the 3 flutes when threading a 3/8-24 UNF hole drilled to 8.50 mm; finished threads must gauge to a 2B class of fit.

What comes with the Cleveland C86219 tap and what must I supply?

The box contains the single cobalt spiral point tap with black oxide finish; you must provide a 8.50 mm drill bit, cutting fluid, a tap wrench or holder, and the workpiece.

Which thread specification should I select for a 3/8-24 UNF application?

Choose the 3/8-24 UNF size with 2B thread limit and 3 flutes; this matches a 75 percent thread depth using an 8.50 mm drill size.

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